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Effects of Window Size on Accuracy and Spatial Resolution in Windowed Phase‐Shifting Digital Holographic Interferometry 1
Author(s) -
Morimoto Y.,
Matui T.,
Fujigaki M.,
Kawagishi N.
Publication year - 2008
Publication title -
strain
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.477
H-Index - 47
eISSN - 1475-1305
pISSN - 0039-2103
DOI - 10.1111/j.1475-1305.2008.00453.x
Subject(s) - electronic speckle pattern interferometry , holographic interferometry , optics , speckle pattern , digital holography , speckle noise , interferometry , displacement (psychology) , holography , speckle imaging , image resolution , noise (video) , noise reduction , phase (matter) , spatial frequency , reduction (mathematics) , physics , computer science , acoustics , mathematics , artificial intelligence , quantum mechanics , psychology , geometry , image (mathematics) , psychotherapist
Phase‐shifting digital holographic interferometry is a new method to measure displacement distribution on the surface of an object. Usually holography has speckle noise, which leads to a large error in the analysis of displacement and strain distributions. We previously proposed windowed phase‐shifting digital holographic interferometry (windowed PSDHI). The use of this method leads to accurate displacement analysis, decreasing the effect of speckle patterns. However, noise reduction involves a defect, which renders the spatial resolution low. In this paper, by comparing the conventional noise reduction method using spatial averaging with the windowed PSDHI on spatial resolution, the effectiveness of noise reduction is discussed.